Bump filelock from 3.19.1 to 3.20.0

Bumps [filelock](https://github.com/tox-dev/py-filelock) from 3.19.1 to 3.20.0.
- [Release notes](https://github.com/tox-dev/py-filelock/releases)
- [Changelog](https://github.com/tox-dev/filelock/blob/main/docs/changelog.rst)
- [Commits](tox-dev/filelock@3.19.1...3.20.0)

---
updated-dependencies:
- dependency-name: filelock
  dependency-version: 3.20.0
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

setup.py

@@ -73,7 +73,7 @@ def read(path: str) -> str:
             "pytest-aiohttp==1.0.5",
             "pytest-asyncio==1.1.0",
             "pytest-xdist==3.8.0",  # enables parallel testing
-            "filelock==3.19.1",  # used for locks when running in parallel mode
+            "filelock==3.20.0",  # used for locks when running in parallel mode
         ],
         "develop": [
             "black==22.3.0",